Ad industry observers see a growing trend in agency executives switching to the client side only to return to the agency world after a short period. The reasons for the moves vary, but agency executives say being on the client side gave them valuable insights and experiences. "The entire industry would continue to be better off if there was more cross-pollination," said Pat Lafferty, CEO of BBH North America who was formerly the top marketer at the Travel Channel. Digiday.com (02/23)

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